Kris Jenner Posts Topless, Pregnant Photo For Son Rob Kardashian's Birthday

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Only in the Kardashian/Jenner Household:

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Kris Jenner took a photo of herself (almost) naked and pregnant back in 1987. This was waaaay before Demi Moore's infamous Vanity Fair cover with the same hands-over-breasts profile pose.

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And yesterday Jenner posted the vintage photo on her Celeb Buzz blog in honor of her son Rob Kardashian's 25th birthday.

In the photos, you can see her with bangs and and longer hair, along with a big baby bump and rather large white underwear.

The tender caption reads: "Happy 25th birthday to my wonderful, handsome son, Rob!! Rob, you are the best son a mother could ask for and you make me proud every day. I love you so much!!"

The whole K-Klan celebrated in Las Vegas this weekend with a family dinner at the 1 Oak Club at the Mirage. And naturally Kim Kardashian tweeted photos of her mom dancing up a storm at the club afterwards -- captioned "How pretty is my Mommy?" -- for her millions of followers.

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Because that's just how the Kardashians roll.